<customUI xmlns="http://schemas.microsoft.com/office/2006/01/customui" 
          onLoad="OnLoad">
  <ribbon>
    <tabs>
		<tab idMso="TabAddIns">
			<group id="uimGroup" label="UI Manager">
				<toggleButton id="toggleTaskPane"
							  label="TaskPane"
							  imageMso="ControlLayoutStacked"
							  size="large"
							  onAction="OnToggleTaskPane" />
			</group>
			<group id="mailServiceGroup"
				   label="Add-in Services"
				   getVisible="GetVisible">
				<button id="sendList"
						label="Send"
						imageMso="OtherActionsMenu"
						size="large"
						onAction="OnSendList"/>
			</group>
			<group idMso="GroupShow" />
		</tab>
    </tabs>
  </ribbon>
</customUI>
